function setHeaderBG() {
	var now = new Date();
	var i = (now.getSeconds())%44;
	//var target = "file://C:/DATA/WEBPAGES/denul.net/portfolio/PHOTO";
	var target = "http://users.pandora.be/rdn/portfolio/PHOTO";
	a = "url("+target+"/header/ph"+i+".jpg)";
	document.getElementById("header").style.backgroundImage=a;
}